Finding the Third Proportional to 18,809.72 and 38,135.81

Step by Step Solution

1. Step 1: Write the proportion equation
   18,809.72 : 38,135.81 = 38,135.81 : x
2. Step 2: Convert to fraction form
   18,809.72/38,135.81 = 38,135.81/x
3. Step 3: Cross multiply
   18,809.72x = 38,135.81 × 38,135.81
4. Step 4: Simplify right side
   18,809.72x = 1,454,340,195.04
5. Step 5: Solve for x
   x = 1,454,340,195.04/18,809.72
6. Step 6: Final answer
   x = 77,318.55